直流道PEMFC两相流数学模型  

Mathematical Model for Two-phase Flows in a Proton Exchange Membrane Fuel Cell with Straight Flow Channels

作　　者：刘训良[1] 楼国锋[1] 温治[1] 

机构地区：[1]北京科技大学机械工程学院热能工程系,北京100083

出　　处：《计算物理》2012年第6期815-822,共8页Chinese Journal of Computational Physics

基　　金：国家自然科学基金(50934007)资助项目

摘　　要：建立直流道质子交换膜燃料电池(PEMFC)三维非等温两相流数学模型,基于质子交换膜与气体之间的水分传递特征,综合考虑电渗、浓度扩散及电化学反应作用的影响,发展了膜电极水分传递的非平衡扩散模型.并自主开发程序代码对电池内复杂的多物理场耦合传递过程进行数值模拟,研究PEMFC电极内气态水、液态水分布、质子膜含水量分布和水迁移特性等,分析单电池内部的温度分布特征,并获得电池极化性能曲线.A non-isothermal three-dimensional（3D） two-phase flow transport model is developed for a proton exchange membrane fuel cell（PEMFC） with straight flow channels.Based on characteristics of water transport between membrane and gas phase,a non-equilibrium model is developed for liquid water transport in membrane,considering electroosmosis,concentration diffusion and electrochemical reaction.A finite volume method is used to discretize governing equations and solution code is developed.The model is used to simulate multi-physical field coupled transport in a PEMFC.Investigations are performed for water vapor concentration,liquid water saturation,membrane water content distribution and liquid water transport velocity.Temperature field inside a cell and predicted polarization are obtained.

关 键 词：质子交换膜燃料电池 两相流 数学模型 

分 类 号：TM911[电气工程—电力电子与电力传动]